RE: Open .B files with Lotus 1-2-3 Viewer for Windows 7? Lee Mosqueda 2.Apr.12 04:12 PM Lotus Notes 1-2-3 All ReleasesWindows 7
I have seen the sites that claim that a .B file is for a product called "Lotus Applause". However, I believe those sites are in error. To my knowledge Lotus has never produced a product with that name.
In the mid 80's / early 90's there was apparently a product called Applause that was produced by Ashton-Tate. It's possible your files were made by it. That said, it doesn't seem like that product has been made for a very long time, so finding a program that can read your files may prove quite difficult.